Notebook for developing ideas to go into TellRemoval code.
Need to apply scaling of T^x to transmision of water at full resolving power and then apply a kernal to apply in at resolution of CRIRES.
Fit to the observed data (Probably with the other lines removed) to fnd the best x to apply for the correction. (Gives flatest result or zero linewidth.)
### Load modules and Bokeh
# Imports from __future__ in case we're running Python 2
from __future__ import division, print_function
from __future__ import absolute_import, unicode_literals
import numpy as np
import matplotlib.pyplot as plt
from astropy.io import fits
# Seaborn, useful for graphics
import seaborn as sns
# Magic function to make matplotlib inline; other style specs must come AFTER
%matplotlib inline
# Import Bokeh modules for interactive plotting
import bokeh.io
import bokeh.mpl
import bokeh.plotting
# This enables SVG graphics inline. There is a bug, so uncomment if it works.
%config InlineBackend.figure_formats = {'svg',}
# This enables high resolution PNGs. SVG is preferred, but has problems
# rendering vertical and horizontal lines
#%config InlineBackend.figure_formats = {'png', 'retina'}
# JB's favorite Seaborn settings for notebooks
rc = {'lines.linewidth': 1,
'axes.labelsize': 14,
'axes.titlesize': 16,
'axes.facecolor': 'DFDFE5'}
sns.set_context('notebook', rc=rc)
sns.set_style('darkgrid', rc=rc)
# Set up Bokeh for inline viewing
bokeh.io.output_notebook()
chip1 = "CRIRE.2012-04-07T00-08-29.976_1.nod.ms.norm.sum.wavecal.fits"
chip2 = "CRIRE.2012-04-07T00-08-29.976_2.nod.ms.norm.sum.wavecal.fits"
chip3 = "CRIRE.2012-04-07T00-08-29.976_3.nod.ms.norm.sum.wavecal.fits"
chip4 = "CRIRE.2012-04-07T00-08-29.976_4.nod.ms.norm.sum.wavecal.fits"
Obs1 = fits.getdata(chip1)
hdr1 = fits.getheader(chip1)
Obs2 = fits.getdata(chip2)
hdr2 = fits.getheader(chip2)
Obs3 = fits.getdata(chip3)
hdr3 = fits.getheader(chip3)
Obs4 = fits.getdata(chip4)
hdr4 = fits.getheader(chip4)
print("Column names = {}".format(Obs1.columns.names))
wl1 = Obs1["Wavelength"]
I1_uncorr = Obs1["Extracted_DRACS"]
wl2 = Obs2["Wavelength"]
I2_uncorr = Obs2["Extracted_DRACS"]
wl3 = Obs3["Wavelength"]
I3_uncorr = Obs3["Extracted_DRACS"]
wl4 = Obs4["Wavelength"]
I4_uncorr = Obs4["Extracted_DRACS"]
start_airmass = hdr1["HIERARCH ESO TEL AIRM START"]
end_airmass = hdr1["HIERARCH ESO TEL AIRM END"]
obs_airmass = (start_airmass + end_airmass) / 2
print("Data from Detectors is now loaded")
## Rough berv correction until input calibrated file is calibrated with non berv tapas
wl1 = wl1-.5 #including rough berv correction
wl2 = wl2-.54 #including rough berv correction
wl3 = wl3-.55 #including rough berv correction
wl4 = wl4-.7
import Obtain_Telluric as obt
tapas_all = "tapas_2012-04-07T00-24-03_ReqId_10_R-50000_sratio-10_barydone-NO.ipac"
tapas_h20 = "tapas_2012-04-07T00-24-03_ReqId_12_No_Ifunction_barydone-NO.ipac"
tapas_not_h20 = "tapas_2012-04-07T00-24-03_ReqId_18_R-50000_sratio-10_barydone-NO.ipac"
tapas_all_data, tapas_all_hdr = obt.load_telluric("", tapas_all)
tapas_all_airmass = float(tapas_all_hdr["airmass"])
print("Telluric Airmass ", tapas_all_airmass)
tapas_all_respower = int(float((tapas_all_hdr["respower"])))
print("Telluric Resolution Power =", tapas_all_respower)
tapas_h20_data, tapas_h20_hdr = obt.load_telluric("", tapas_h20)
tapas_h20_airmass = float(tapas_h20_hdr["airmass"])
print("Telluric Airmass ", tapas_h20_airmass)
try:
tapas_h20_respower = int(float((tapas_h20_hdr["respower"])))
except:
tapas_h20_respower = "Nan"
print("Telluric Resolution Power =", tapas_h20_respower)
tapas_not_h20_data, tapas_not_h20_hdr = obt.load_telluric("", tapas_not_h20)
tapas_not_h20_airmass = float(tapas_not_h20_hdr["airmass"])
print("Telluric Airmass ", tapas_not_h20_airmass)
tapas_not_h20_respower = int(float((tapas_not_h20_hdr["respower"])))
print("Telluric Resolution Power =", tapas_not_h20_respower)
Including the 3 tapas models to show they align well and are consistent.
plt.plot(wl1, I1_uncorr, 'b') #including rough berv correction
plt.plot(wl2, I2_uncorr, 'b') #including rough berv correction
plt.plot(wl3, I3_uncorr, 'b') #including rough berv correction
plt.plot(wl4, I4_uncorr, 'b') #including rough berv correction
plt.plot(tapas_h20_data[0], tapas_h20_data[1], "--k", label="H20")
plt.plot(tapas_all_data[0], tapas_all_data[1], "-r", label="all")
plt.plot(tapas_not_h20_data[0], tapas_not_h20_data[1], "-.g", label="Not H20")
#plt.legend()
# Make it interactive with Bokeh
bokeh.plotting.show(bokeh.mpl.to_bokeh())
(Use telluric removal modules) And plot the result.
from TellRemoval import divide_spectra, airmass_scaling, telluric_correct, match_wl
def correction(wl_obs, spec_obs, wl_tell, spec_tell, obs_airmass, tell_airmass, kind="linear", method="scipy"):
interped_tell = match_wl(wl_tell, spec_tell, wl_obs)
scaled_tell = airmass_scaling(interped_tell, tell_airmass, obs_airmass)
corr_spec = divide_spectra(spec_obs, scaled_tell) # Divide by scaled telluric spectra
return corr_spec
#def telluric_correct(wl_obs, spec_obs, wl_tell, spec_tell, obs_airmass, tell_airmass, kind="linear", method="scipy"):
# return Corrections, Correction_tells, Correction_Bs, Correction_labels
# Corrections, Correction_tells, Correction_Bs, Correction_labels = telluric_correct(wl2, I2_uncorr, tapas_not_h20[0], tapas_not_h20[1], obs_airmass, tapas_not_h20_airmass)
# Getting zero division error from this function so will try it again from te functions here
tell_airmass = tapas_not_h20_airmass
I1_not_h20_corr = correction(wl1, I1_uncorr, tapas_not_h20_data[0], tapas_not_h20_data[1], obs_airmass, tapas_not_h20_airmass, kind="linear", method="scipy")
I2_not_h20_corr = correction(wl2, I2_uncorr, tapas_not_h20_data[0], tapas_not_h20_data[1], obs_airmass, tapas_not_h20_airmass, kind="linear", method="scipy")
I3_not_h20_corr = correction(wl3, I3_uncorr, tapas_not_h20_data[0], tapas_not_h20_data[1], obs_airmass, tapas_not_h20_airmass, kind="linear", method="scipy")
I4_not_h20_corr = correction(wl4, I4_uncorr, tapas_not_h20_data[0], tapas_not_h20_data[1], obs_airmass, tapas_not_h20_airmass, kind="linear", method="scipy")
plt.plot(wl1, I1_uncorr, "b")
plt.plot(wl2, I2_uncorr, "b")
plt.plot(wl3, I3_uncorr, "b")
plt.plot(wl4, I4_uncorr, "b")
plt.plot(wl1, I1_not_h20_corr, "r")
plt.plot(wl2, I2_not_h20_corr, "r")
plt.plot(wl3, I3_not_h20_corr, "r")
plt.plot(wl4, I4_not_h20_corr, "r")
plt.plot(tapas_not_h20_data[0], tapas_not_h20_data[1], "k")
# Make it interactive with Bokeh
bokeh.plotting.show(bokeh.mpl.to_bokeh())
To use inside fit
def colvolution_function(wl, I, respower):
return I_conv
# Convolution from NIR analysis
# Convolution from Pyastronomy
from PyAstronomy import pyasl
#print(hdr3)
## Convolution from Pedro NIR analysis code
def wav_selector(wav, flux, wav_min, wav_max):
"""
function that returns wavelength and flux withn a giving range
"""
wav_sel = np.array([value for value in wav if(wav_min < value < wav_max)], dtype="float64")
flux_sel = np.array([value[1] for value in zip(wav,flux) if(wav_min < value[0] < wav_max)], dtype="float64")
return [wav_sel, flux_sel]
def chip_selector(wav, flux, chip):
chip = str(chip)
if(chip in ["ALL", "all", "","0"]):
chipmin = float(hdr1["HIERARCH ESO INS WLEN STRT1"]) # Wavelength start on detector [nm]
chipmax = float(hdr1["HIERARCH ESO INS WLEN END4"]) # Wavelength end on detector [nm]
#return [wav, flux]
elif(chip == "1"):
chipmin = float(hdr1["HIERARCH ESO INS WLEN STRT1"]) # Wavelength start on detector [nm]
chipmax = float(hdr1["HIERARCH ESO INS WLEN END1"]) # Wavelength end on detector [nm]
elif(chip == "2"):
chipmin = float(hdr1["HIERARCH ESO INS WLEN STRT2"]) # Wavelength start on detector [nm]
chipmax = float(hdr1["HIERARCH ESO INS WLEN END2"]) # Wavelength end on detector [nm]
elif(chip == "3"):
chipmin = float(hdr1["HIERARCH ESO INS WLEN STRT3"]) # Wavelength start on detector [nm]
chipmax = float(hdr1["HIERARCH ESO INS WLEN END3"]) # Wavelength end on detector [nm]
elif(chip == "4"):
chipmin = float(hdr1["HIERARCH ESO INS WLEN STRT4"]) # Wavelength start on detector [nm]
chipmax = float(hdr1["HIERARCH ESO INS WLEN END4"]) # Wavelength end on detector [nm]
else:
print("Unrecognized chip tag.")
exit()
#select values form the chip
wav_chip, flux_chip = wav_selector(wav, flux, chipmin, chipmax)
return [wav_chip, flux_chip]
def unitary_Gauss(x, center, FWHM):
"""
Gaussian_function of area=1
p[0] = A;
p[1] = mean;
p[2] = FWHM;
"""
sigma = np.abs(FWHM) /( 2 * np.sqrt(2 * np.log(2)) );
Amp = 1.0 / (sigma*np.sqrt(2*np.pi))
tau = -((x - center)**2) / (2*(sigma**2))
result = Amp * np.exp( tau );
return result;
def convolution_nir(wav, flux, chip, R, FWHM_lim=5.0, plot=True):
"""Convolution code adapted from pedros code"""
wav_chip, flux_chip = chip_selector(wav, flux, chip)
#we need to calculate the FWHM at this value in order to set the starting point for the convolution
print(wav_chip)
print(flux_chip)
FWHM_min = wav_chip[0]/R #FWHM at the extremes of vector
FWHM_max = wav_chip[-1]/R
#wide wavelength bin for the resolution_convolution
wav_extended, flux_extended = wav_selector(wav, flux, wav_chip[0]-FWHM_lim*FWHM_min, wav_chip[-1]+FWHM_lim*FWHM_max)
wav_extended = np.array(wav_extended, dtype="float64")
flux_extended = np.array(flux_extended, dtype="float64")
print("Starting the Resolution convolution...")
flux_conv_res = []
counter=0
for wav in wav_chip:
# select all values such that they are within the FWHM limits
FWHM = wav/R
indexes = [ i for i in range(len(wav_extended)) if ((wav - FWHM_lim*FWHM) < wav_extended[i] < (wav + FWHM_lim*FWHM))]
flux_2convolve = flux_extended[indexes[0]:indexes[-1]+1]
IP = unitary_Gauss(wav_extended[indexes[0]:indexes[-1]+1], wav, FWHM)
flux_conv_res.append(np.sum(IP*flux_2convolve))
if(len(flux_conv_res)%(len(wav_chip)/100 ) == 0):
counter = counter+1
print("Resolution Convolution at %d%%..." % (counter))
flux_conv_res = np.array(flux_conv_res, dtype="float64")
print("Done.\n")
if(plot):
fig=plt.figure(1)
plt.xlabel(r"wavelength [ $\mu$m ])")
plt.ylabel(r"flux [counts] ")
plt.plot(wav_chip, flux_chip/np.max(flux_chip), color ='k', linestyle="-", label="Original spectra")
plt.plot(wav_chip, flux_conv_res/np.max(flux_conv_res), color ='b', linestyle="-", label="Spectrum observed at and R=%d ." % (R))
plt.legend(loc='best')
plt.show()
return wav_chip, flux_conv_res
x, y = convolution_nir(tapas_h20_data[0], tapas_h20_data[1], "0", 5000, FWHM_lim=5.0, plot=True)
plt.plot(tapas_h20_data[0], tapas_h20_data[1],"b")
plt.plot(x,y, "r")
plt.xlabel("Wavelength (nm)")
plt.ylabel("Flux")
plt.tilte("Test of convolution")
plt.show()
# Make it interactive with Bokeh
#bokeh.plotting.show(bokeh.mpl.to_bokeh())
Does each chip need a differnet scaling power?
And plot the result.